sensors Mode-S transponder
A37A92
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N323MK · GULFSTREAM 4 · operated by MKRE EQUIPMENT LLC
- Hex
- A37A92
- Octal
- 50675222
- Decimal
- 10,713,746
- Country
- US
- Tail
- N323MK
- Type
- GLF4
- Flights observed
- 41
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- Jul 22, 20:35 UTC
Last known position
Country allocation
The ICAO 24-bit address A37A92 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.
Callsign history 1 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| N323MK | - | 41 | 2026-07-22 |
Recent flights last 41
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-22 | N323MK | - | Jul 22, 17:25 UTC | Jul 22, 20:35 UTC | 3h 10m |
| 2026-07-20 | N323MK | - | Jul 20, 20:15 UTC | Jul 21, 00:40 UTC | 4h 25m |
| 2026-07-20 | N323MK | - | Jul 20, 15:10 UTC | Jul 20, 19:05 UTC | 3h 55m |
| 2026-07-19 | N323MK | TEB → BED | Jul 19, 15:50 UTC | Jul 19, 16:30 UTC | 40m |
| 2026-07-19 | N323MK | - | Jul 19, 11:15 UTC | Jul 19, 14:05 UTC | 2h 50m |
| 2026-07-16 | N323MK | - | Jul 16, 23:05 UTC | Jul 16, 23:55 UTC | 50m |
| 2026-07-16 | N323MK | - | Jul 16, 13:40 UTC | Jul 16, 18:19 UTC | 4h 40m |
| 2026-07-12 | N323MK | - | Jul 12, 20:20 UTC | Jul 12, 22:55 UTC | 2h 35m |
| 2026-07-11 | N323MK | - | Jul 11, 15:50 UTC | Jul 11, 19:05 UTC | 3h 15m |
| 2026-07-09 | N323MK | - | Jul 9, 21:45 UTC | Jul 9, 23:05 UTC | 1h 20m |
| 2026-07-05 | N323MK | - | Jul 5, 17:35 UTC | Jul 5, 19:50 UTC | 2h 15m |
| 2026-07-05 | N323MK | - | Jul 5, 14:30 UTC | Jul 5, 16:50 UTC | 2h 20m |
| 2026-06-26 | N323MK | - | Jun 26, 17:59 UTC | Jun 26, 20:15 UTC | 2h 15m |
| 2026-06-26 | N323MK | - | Jun 26, 15:15 UTC | Jun 26, 17:19 UTC | 2h 5m |
| 2026-06-25 | N323MK | - | Jun 25, 17:09 UTC | Jun 25, 17:20 UTC | 10m |
| 2026-06-21 | N323MK | - | Jun 21, 18:44 UTC | Jun 21, 18:54 UTC | 10m |
| 2026-06-14 | N323MK | - | Jun 14, 05:25 UTC | Jun 14, 07:45 UTC | 2h 20m |
| 2026-06-13 | N323MK | - | Jun 13, 19:00 UTC | Jun 13, 21:40 UTC | 2h 40m |
| 2026-06-11 | N323MK | - | Jun 11, 16:45 UTC | Jun 11, 19:10 UTC | 2h 25m |
| 2026-06-11 | N323MK | - | Jun 11, 11:45 UTC | Jun 11, 14:15 UTC | 2h 30m |
| 2026-06-09 | N323MK | - | Jun 9, 13:55 UTC | Jun 9, 15:50 UTC | 1h 55m |
| 2026-06-08 | N323MK | OPF → TEB | Jun 8, 14:50 UTC | Jun 8, 18:15 UTC | 3h 25m |
| 2026-06-05 | N323MK | - | Jun 5, 16:15 UTC | Jun 5, 19:50 UTC | 3h 35m |
| 2026-05-30 | N323MK | - | May 30, 16:35 UTC | May 30, 19:40 UTC | 3h 5m |
| 2026-05-26 | N323MK | - | May 26, 04:54 UTC | May 26, 07:19 UTC | 2h 25m |
| 2026-05-25 | N323MK | - | May 25, 17:40 UTC | May 25, 19:54 UTC | 2h 14m |
| 2026-05-22 | N323MK | - | May 22, 15:35 UTC | May 22, 18:45 UTC | 3h 10m |
| 2026-05-19 | N323MK | - | May 19, 15:05 UTC | May 19, 17:40 UTC | 2h 35m |
| 2026-05-16 | N323MK | - | May 16, 15:25 UTC | May 16, 18:10 UTC | 2h 45m |
| 2026-05-16 | N323MK | - | May 16, 12:21 UTC | May 16, 14:51 UTC | 2h 30m |
| 2026-05-07 | N323MK | - | May 7, 16:55 UTC | May 7, 17:10 UTC | 15m |
| 2026-05-01 | N323MK | - | May 1, 02:10 UTC | May 1, 03:35 UTC | 1h 25m |
| 2026-04-30 | N323MK | - | Apr 30, 19:40 UTC | Apr 30, 21:10 UTC | 1h 30m |
| 2026-04-29 | N323MK | - | Apr 29, 14:15 UTC | Apr 29, 16:40 UTC | 2h 25m |
| 2026-04-27 | N323MK | - | Apr 27, 13:45 UTC | Apr 27, 16:20 UTC | 2h 35m |
| 2026-04-26 | N323MK | - | Apr 26, 01:10 UTC | Apr 26, 02:30 UTC | 1h 20m |
| 2026-04-25 | N323MK | - | Apr 25, 18:50 UTC | Apr 25, 20:20 UTC | 1h 30m |
| 2026-04-19 | N323MK | - | Apr 19, 18:25 UTC | Apr 19, 18:45 UTC | 20m |
| 2026-04-19 | N323MK | - | Apr 19, 15:40 UTC | Apr 19, 15:55 UTC | 15m |
| 2026-04-17 | N323MK | - | Apr 17, 18:15 UTC | Apr 17, 18:50 UTC | 35m |
| 2026-04-17 | N323MK | - | Apr 17, 16:50 UTC | Apr 17, 17:05 UTC | 15m |
About Mode-S
A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.
Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.
Prefer a tail-number view? See the N323MK page for operator, model, and routing details .